JP6110784B2 - Disk unit - Google Patents

Description

  The present invention relates to a disk device that transports a disk inserted from a disk insertion slot to the inside of a device body to perform a reproduction operation, and more particularly to a disk detection mechanism that detects insertion and / or ejection of a disk. Is.

  An in-vehicle disk device used by loading a disk such as a CD or a DVD has a main body having a horizontally long disk insertion slot on the front surface and a conveyance mechanism for automatically conveying the disk between the disk insertion slot and a play position. And a drive mechanism for chucking and rotating the disk at the play position, a disk detection mechanism for detecting insertion and / or ejection of the disk, and the like (see, for example, Patent Document 1).

  The transport mechanism includes a roller bracket that supports the transport roller and a guide top (clamping member) that sandwiches the disk between the transport roller and the roller bracket. The roller bracket guides the transport roller by the spring force of the spring. It is urged in the direction close to the lower surface of.

  The drive mechanism includes a turntable that rotates using a motor as a drive source, a clamper that chucks the disk with the turntable, and an optical pickup that records and / or reproduces information on the disk. The pickup is movable in the radial direction of the disc.

  As shown in FIG. 15, the disk detection mechanism includes a support plate 100 fixed to the upper surface or lower surface side of the apparatus body, and a pair of detection levers 102 rotatably supported on the support plate 100 via a support shaft 101. A pair of detection pins 103 erected on the front end side of each detection lever 102, a pair of springs 104 that urge the detection lever 102 in a direction in which these detection pins 103 are close to each other, and the detection lever 102 is turned on by rotation. A detection switch (not shown) that is turned off / off is provided, and both detection pins 103 are located inside the disk insertion slot.

  In the disk apparatus schematically configured as described above, in the ejected state where the disk is not loaded in the apparatus main body, the pair of detection levers 102 are stopped at the initial position under the tensile force from the spring 104 as shown in FIG. The distance between the detection pins 103 is kept at the minimum distance L. When the disc D is inserted into the apparatus main body from the disc insertion opening in this state, the outer peripheral edge of the disc D abuts on both the detection pins 103, so that the detection pins 103 are pushed outward (in the direction of the arrow indicated by the broken line). Therefore, both detection levers 102 rotate from the initial position toward the operating position around the support shaft 101. As a result, the detection switch is turned on by the rotation of the detection lever 102, and the transport roller rotates in one direction based on this operation signal, so that the disk D is moved to the play position while being sandwiched between the transport roller and the guide top. The disk D is reproduced by an optical pickup at this play position. While the distance between the detection pins 103 gradually increases during the conveyance of the disk D, the distance between the detection pins 103 is maximized when the diameter of the disk D is positioned on a straight line connecting the detection pins 103. After that, it gradually narrows and becomes the minimum distance L again.

  Further, if the eject button is operated while the disc D is in the play position, the chucking of the disc D is released and the transport roller is driven to rotate in the reverse direction to the above, so that the disc D is transported to the guide roller and the guide top. Are conveyed toward the disc insertion slot. Then, when most of the disk D is transported to a position protruding from the disk insertion slot, the rotation of the transport roller stops based on the operation signal of the detection switch described above, and the user puts his finger on the disk D to It can be taken out from the main body.

JP 2003-228903 A

  By the way, in the conventional disk device configured as described above, when the disk is inserted while being shifted in the left-right direction with respect to the central portion of the disk insertion slot, or when the disk is inserted into the disk insertion slot vigorously, There is a risk that the detection lever that supports the detection pin may be deformed or damaged by the pressing force acting on the detection pin.

  Therefore, conventionally, a technology is known in which a cylindrical resin roller is rotatably supported on the detection pin to reduce the frictional force generated between the disk and the detection pin. In this case, a resin roller is added. As a result, the number of parts increases, resulting in a problem that the cost of parts rises and the assemblability deteriorates. In addition, an arc-shaped guide groove is formed in another member that faces the support plate via the detection lever, and the detection pin is slidably engaged with the guide groove to increase the rigidity of the detection pin. However, in this case, there is a risk of generating a large frictional force between the detection pin and the guide groove due to assembly errors between parts, so the detection lever is used with a spring with a large spring load. There is a problem that it is necessary to urge the disk to the initial position, and the feeling when the disk is inserted deteriorates accordingly.

  The present invention has been made in view of the actual situation of the prior art, and an object thereof is to provide a disk device capable of preventing damage to the disk detection mechanism with a simple configuration.

  In order to achieve the above object, the present invention is provided with a device main body having a horizontally long disk insertion slot on the front surface, and is movable between an initial position and an operating position inside the device main body. A lever member, a detection pin that is supported by the lever member in a cantilever shape and is located inside the disk insertion slot, and a biasing member that biases the lever member toward the initial position. When the pin abuts on the outer peripheral edge of the disk and is pressed away from the center in the width direction of the disk insertion slot, the lever member moves between an initial position and an operating position, and the disk with respect to the apparatus main body is moved. In the disk device configured to detect insertion and / or ejection, a guide portion facing the front surface of the device main body is provided inside the device main body with the detection pin interposed therebetween, The guide portion is formed as an inclined side facing the free end portion of the detection pin with a gap, and the detection pin receives a pressing force of a predetermined level or more from the disk at the initial position of the lever member, and the guide When pressed against the inclined side of the portion, a component force in a direction away from the center in the width direction of the disk insertion slot is applied to the detection pin.

  In the disk device configured as described above, the disk insertion force is applied when the disk is inserted while being shifted in the left-right direction with respect to the central portion of the disk insertion slot, or when the disk is vigorously inserted into the disk insertion slot. When the detection pin is bent and deformed in the gap and pressed against the inclined side of the guide portion, a component force is applied to the detection pin in a direction away from the center in the width direction of the disk insertion slot. The lever member can be smoothly moved from the initial position toward the operating position by the force, and deformation and breakage of the lever member can be prevented. When the disc is inserted from the vicinity of the center of the disc insertion slot, the detection pin contacts the outer periphery of the disc and is pushed away from the center of the width direction of the disc insertion slot. In this case, the lever member can be smoothly moved from the initial position toward the operating position without being pressed against the guide portion.

  In the above configuration, the member having the guide portion is not particularly limited, but a transport roller for transporting the disk into and out of the apparatus main body is disposed inside the disk insertion slot, and the disk is sandwiched between the transport rollers. If the holding member is provided and the guide portion is integrally formed with the holding member, the existing holding member can be used as the guide portion without adding a new member.

  In the disk device of the present invention, a guide portion is provided opposite to the front surface of the device body with the detection pin interposed therebetween, and this guide portion is formed as an inclined side facing the free end portion of the detection pin with a gap. Therefore, even if the disc is inserted while being shifted to the left or right with respect to the center of the disc insertion slot, or the disc is inserted into the disc insertion slot vigorously, the detection pin that receives the disc insertion force bends and deforms. By being pressed against the inclined side of the guide portion, a component force in a direction away from the center in the width direction of the disk insertion slot is applied to the detection pin, and the lever member is smoothly moved from the initial position toward the operating position. be able to.

1 is a perspective view of a disk device according to a first embodiment of the present invention. 2 is a plan view of the disk device. FIG. It is a front view of the disk device. It is a back view of the disk device. FIG. 2 is a perspective view showing the disk device with a top chassis removed. It is sectional drawing which follows the VI-VI line of FIG. FIG. 4 is an explanatory diagram of a main part of a disk detection mechanism provided in the disk device. It is a top view which shows the state which inserted the disk normally in this disk apparatus. It is a top view which shows the state which inserted the disk into this disk apparatus on the right side. It is sectional drawing which follows the XX line of FIG. It is explanatory drawing of the detection pin and guide part with which the disk detection mechanism of FIG. 7 is equipped. It is a perspective view which shows the principal part of the disc apparatus based on the 2nd Example of this invention. It is a top view of the disc detection mechanism shown in FIG. FIG. 13 is a rear view of the disk detection mechanism shown in FIG. 12. It is principal part explanatory drawing of the disc detection mechanism which concerns on a prior art example.

  The embodiment of the invention will be described with reference to the drawings. As shown in FIGS. 1 to 6, the disk device according to the first embodiment of the present invention has a box-like frame that forms the outer shell of the apparatus body. A body 1 and a drive unit 2 supported inside the frame 1 via elastic members such as a damper 3 and a coil spring (not shown) are provided.

  The front plate of the frame body 1 is provided with a horizontally long disk insertion slot 1a, and the disk D is inserted into and discharged from the frame body 1 through the disk insertion slot 1a. A top chassis 4 is installed on the disk insertion port 1 a side on the upper surface of the frame body 1, and a pair of guide tops 5 to be described later are attached to the back surface of the top chassis 4.

  The drive unit 2 is equipped with a turntable 6 for rotating the disk D, a spindle motor 7 as a drive source thereof, an optical pickup 8 for reading an information signal from the disk D, and the like. The drive unit 2 is selectively switched between a locked state and an unlocked state by a lock switching mechanism (not shown). When the disk D is ejected (ejected), the drive unit 2 is fixedly supported with respect to the frame 1. When the disc D is played, the unlocked state is elastically supported by the frame 1.

  A clamp arm 9 is rotatably supported at the rear end portion of the drive unit 2, and a clamper 10 is rotatably supported at a tip portion of the clamp arm 9. The clamp arm 9 is urged by a coil spring (not shown) so as to always approach the drive unit 2, but when the disk D is ejected, the clamp arm 9 is restricted from being separated from the drive unit 2 and waiting upward.

  The pair of guide tops 5 are made of a highly slippery resin molded product, and these guide tops 5 are attached to the left and right positions of the back surface of the top chassis 4 using fixing means such as screws. As shown in FIGS. 5 and 7, a triangular guide part 5 a is projected from the front side of the guide top 5 located on the right side, and the guide part 5 a extends from the front side of the frame 1. It is an inclined side that extends diagonally to the right rear as a vertex. A triangular guide part 5a is projected and formed on the front side of the guide top 5 located on the left side in plan view, and the guide part 5a has an inclined side extending obliquely leftward and leftward with the front side of the frame 1 as a vertex. It has become.

  A roller bracket 11 is swingably supported on the front end side of the drive unit 2, and both ends of the transport roller 12 are rotatably supported by the roller bracket 11. The roller bracket 11 urges the conveying roller 12 in the direction close to the lower surface of the guide top 5 by the elastic force of the spring 13, and the disk D is sandwiched between the conveying roller 12 and the guide top 5. It is conveyed by. The transport roller 12 can be rotated in both forward and reverse directions by using a motor (not shown) as a drive source, and this motor is started and stopped by ON / OFF signals from detection switches 14 and 15 described later.

  A pair of detection levers 16 are disposed below the roller bracket 11, and as shown in FIG. 4, these detection levers 16 are rotatably supported on the bottom surface of the frame body 1 around the support shaft 17. Yes. A pair of guide holes 1b are provided on the bottom surface of the frame body 1, and the protrusions 16a provided on the back surface of the detection lever 16 are engaged with the corresponding guide holes 1b, so that both the detection levers 16 are rotated. The angle is regulated between the initial position and the operating position. Further, a tension spring 18 is stretched between the detection lever 16 and the frame 1, and the pair of detection levers 16 are close to each other by the tension spring 18, that is, the protrusion 16a is one end of the guide hole 1b. It is urged toward the initial position where it abuts the part. Further, a circuit board 19 is fixed to the back surface of the detection lever 16, and the detection switches 14 and 15 described above are mounted on the circuit board 19. Among these detection switches 14 and 15, the detection switch 14 is turned on / off by the rotation of one detection lever 16, and the detection switch 15 is turned on / off by the rotation of the other detection lever 16. .

  Detection pins 20 are provided upright at the front end portions of the detection levers 16, respectively, and these detection pins 20 pass through the front of the roller bracket 11 and project inside the disk insertion slot 1 a (FIGS. 1 and 3). reference). Although the detection lever 16 and the detection pin 20 are integrally formed resin molded products, the detection pin 20 as a separate member may be provided in a cantilever shape by using a fixing means such as caulking to the detection lever 16. The upper end portion (free end portion) of the detection pin 20 is located in front of the guide portion 5a protruding from the guide top 5, and in an ejected state in which the disk D is not loaded in the device body, as shown in FIG. The inclined side of the guide portion 5a faces the detection pin 20 with a gap G therebetween.

  Next, the operation of the disk device configured as described above will be described.

  At the time of ejection (standby state) when the disk D is not loaded in the apparatus body, the drive unit 2 is in a locked state in which it is fixedly supported with respect to the frame 1, and the clamp arm 9 moves the clamper 10 to the turntable 6. It is pivoting upward so as to be separated from. Further, the roller bracket 11 has a forward inclined posture in which the rear end side that pivotally supports the conveying roller 12 is raised, and the outer peripheral surface of the conveying roller 12 is pressed against the lower surface of the guide top 5 by receiving the spring force of the spring 13. (See FIG. 6). Further, both detection levers 16 are stopped at the initial position under the spring force of the tension spring 18, and the distance between the pair of detection pins 20 is kept at a minimum distance.

  In this state, when the disc D is inserted into the frame 1 from the vicinity of the center in the width direction of the disc insertion slot 1a, the outer peripheral edge of the disc D comes into contact with both detection pins 20 as shown in FIG. Since 20 is pushed outward, both detection levers 16 rotate from the initial position toward the operating position around the support shaft 17. At this time, since both detection pins 20 are pushed and spread so as to move outward in response to the insertion force of the disk D, the detection lever 16 that supports the detection pin 20 rotates smoothly around the support shaft 17 to detect the detection pin. 20 does not contact the inclined side of the guide portion 5a.

  When both the detection levers 16 are rotated by the insertion operation of the disk D in this way, first, the detection switch 14 is turned on by one detection lever 16, and a motor (not shown) is started based on this operation signal, so that the transport roller 12. Is rotated in one direction, and the disk D is conveyed into the frame 1 while being sandwiched between the conveying roller and the 12 guide top 5. During this time, the clamp arm 9 and the clamper 10 are held at the standby position above the drive unit 2, and the drive unit 2 is maintained in the locked state, so that the disk D is transported to the play position without colliding with the drive unit 2. When a regular disk D is inserted, an operation signal is output from another detection switch 15 by the rotation of the other detection lever 16 when the disk D is transported by a predetermined amount. The disc D can be determined to be a regular disc. However, when a non-circular disk or a foreign object other than the disk is inserted, an operation signal is not output from the detection switch 15 at a predetermined timing. In this case, the motor is controlled to rotate the transport roller 12 in the other direction. Then, the inserted foreign matter can be discharged without being conveyed to the inside of the frame 1.

  When the central portion of the disk D is thus transported to just above the turntable 6, the drive unit 2 is unlocked and unlocked, and the standby position of the clamp arm 9 is released and rotates downward. The play state in which the disk D is chucked between the turntable 6 and the clamper 10 is entered. Further, in conjunction with this operation, a switching mechanism (not shown) swings the roller bracket 11 downward, so that the transport roller 12 is lowered to a retracted position where there is no possibility of contacting the lower surface of the disk D, and the optical pickup 8 is moved. Since the switch (not shown) is turned on by being transferred to the outside in the radial direction of the disk D, the motor, which is the drive source of the transport roller 12, is stopped based on the operation signal. In this play state, when the spindle motor 7 is driven to rotate, the turntable 6, the disk D, and the clamper 10 rotate integrally, and information is recorded and recorded by the optical pickup 8 transferred in the radial direction of the disk D. A playback operation is performed.

  Further, when ejecting the disk D from the apparatus main body, if an unillustrated eject button is operated, an operation reverse to the above is performed to release the chucking of the disk D and the transport roller 12 is moved in the reverse direction. Since the disk D is rotationally driven in the other direction, the disk D is transported toward the disk insertion slot 1a while being sandwiched between the transport roller 12 and the guide top 5. Also in this case, when both detection pins 20 abut against the outer peripheral edge of the disk D and are spread outward, the detection switch 14 is first turned on by one detection lever 16 and then detected by the other detection lever 16. When the switch 15 is turned on and the motor is stopped when the detection switch 15 is turned on, the rotation of the transport roller 12 is stopped. At this time, most of the disc D is transported to a position protruding from the disc insertion slot 1a, and the user can take it out of the device main body by placing a finger on the disc D.

  So far, the normal operation in which the regular disc D is inserted into the disc insertion slot 1a from near the center has been described. However, the disc D can be inserted while being shifted in the horizontal direction with respect to the central portion of the disc insertion slot 1a. When D is inserted into the disc insertion slot 1a vigorously or a non-circular irregularly shaped disc is inserted into the disc insertion slot 1a, the detection pin 20 is bent in the insertion direction of the disc and can be pushed outward. There is a risk of disappearing.

  For example, as shown in FIG. 9, when the disc D is inserted to the right of the disc insertion slot 1a, the direction of the insertion force acting on the detection pin 20 on the right side of the drawing from the disc D is the rotation center (support shaft 17) of the detection lever 16. Therefore, a pressing force substantially parallel to the disc insertion direction acts on the detection pin 20, and as shown in FIG. 10, the detection pin 20 has the detection lever 16 side as a fixed end in the insertion direction of the disc D. Deforms and deforms. That is, as shown in FIG. 11A, when the disc D is ejected, the detection pin 20 faces the inclined side of the guide portion 5a with a gap G, but as shown in FIG. When the detection pin 20 receives a predetermined pressure or more from the disk D and bends and deforms, the upper end portion (free end) of the detection pin 20 is pressed against the inclined side of the guide portion 5a. As a result, a component force of the pressing force acting in the direction of the arrow A is generated in the direction of the arrow B along the inclined side of the guide portion 5a at the pressing position between the detection pin 20 and the guide portion 5a. Since the detection pin 20 is urged by the force in a direction away from the center of the width direction of the disk insertion slot 1a (right direction), the detection lever 16 that supports the detection pin 20 rotates smoothly from the initial position toward the operating position. It will be.

  When the disc D is inserted to the left of the disc insertion slot 1a, the same pressing force is applied from the disc D to the detection pin 20 on the left side of the drawing, and the detection pin 20 is opposed to the rear of the guide portion 5a. It is press-contacted to the inclined side. As a result, the detection pin 20 on the left side in the figure is biased in the direction away from the center in the width direction of the disk insertion slot 1a (left direction), so that the detection lever 16 that supports the detection pin 20 moves from the initial position toward the operating position. Will rotate smoothly. Further, when the disk D is vigorously inserted into the disk insertion slot 1a or an irregularly shaped disk such as a star is inserted, the detection is detected when the detection pin 20 is deformed and pressed against the inclined side of the guide portion 5a. Since the component force in the direction away from the center in the width direction of the disk insertion slot 1a is applied to the pin 20, the detection lever 16 can be smoothly moved from the initial position toward the operating position.

  As described above, in the disk device according to the first embodiment, the guide portion 5a facing the front plate of the frame 1 with the detection pin 20 interposed therebetween is provided inside the device body, and this guide portion 5a. Is formed as an inclined side facing the free end of the detection pin 20 with a gap G therebetween, so that the disc D is inserted while being shifted in the left-right direction with respect to the central portion of the disc insertion slot 1a. Even if the disc is inserted into the disc insertion slot 1a vigorously, the detection pin 20 that has received the disc insertion force is bent and deformed and is pressed against the inclined side of the guide portion 5a. A component force in a direction away from the center in the width direction is applied. Therefore, it is possible to prevent the detection lever 16 from rotating smoothly from the initial position toward the operating position by this component force, and to prevent the detection lever 16 from being deformed or damaged.

  In the first embodiment, the guide portion 5 a is formed integrally with the guide top 5, and the guide top 5 is a member necessary as a clamping member that clamps the disk D with the conveying roller 12. The guide portion 5a can be formed only by changing the shape of the existing guide top 5 without adding a new member.

  In the disk device according to the first embodiment described above, the detection pin 20 is supported by the detection lever 16 that can rotate around the support shaft 17, but the second embodiment shown in FIGS. As described above, the detection pin 20 may be supported by a lever member that can move in the left-right direction.

  That is, in the disk device according to the second embodiment, a pair of lever members 21 are arranged on the inner side of the front plate of the frame 1 so as to be movable in the left-right direction. Is supported in the shape of a cantilever. Both lever members 21 are urged toward each other by a tension spring 22 so that both lever members 21 are held at the closest initial positions when the disk D is not loaded in the apparatus main body. It has become. Both detection pins 20 are located inside a disk insertion slot 1a provided in the front plate of the frame 1, and a guide portion 23a is disposed on the opposite side of the detection pins 20 to the disk insertion slot 1a. The guide portion 23a is formed as an inclined side facing the upper end portion (free end portion) of the detection pin 20 with a gap, and the guide portion 23a is an appropriate member attached to the inside of the frame 1, for example, a guide. It is provided on the front side of the top 23.

  Even in the second embodiment configured as described above, even when the disc D is inserted while being shifted in the left-right direction with respect to the central portion of the disc insertion slot 1a, or when the disc D is vigorously inserted into the disc insertion slot 1a, The detection pin 20 that has received the disk insertion force is bent and deformed and pressed against the inclined side of the guide portion 23a, whereby a component force in a direction away from the center in the width direction of the disk insertion port 1a is applied to the detection pin 20. Therefore, the lever member 21 can be smoothly slid from the initial position toward the operating position by this component force.

  Further, in each of the above-described embodiments, the detection pins and the guide portions are arranged on both the left and right sides of the center portion in the width direction of the disk insertion slot 1a, but it is not necessary to detect the insertion of a foreign object or a deformed disk. The detection pin and the guide portion may be arranged only on either the left or right side.

1 Frame (device body)
DESCRIPTION OF SYMBOLS 1a Disc insertion slot 1b Guide hole 2 Drive unit 4 Top chassis 5 Guide top 5a Guide part 11 Roller bracket 12 Conveyance rollers 14, 15 Detection switch 16 Detection lever (lever member)
16a protrusion 17 support shaft 18 tension spring 20 detection pin 21 lever member 22 tension spring 23 guide top 23a guide portion D disk G gap

Claims (2)

A device main body with a horizontally long disk insertion opening on the front surface, a lever member disposed inside the device main body so as to be movable between an initial position and an operation position, and a cantilever-like shape on the lever member A detection pin that is supported on the inner side of the disk insertion port and a biasing member that biases the lever member toward an initial position, and the detection pin abuts against an outer peripheral edge of the disk to insert the disk. A disk device in which the lever member is moved between an initial position and an operating position by being pressed away from the center in the width direction of the mouth to detect insertion and / or ejection of the disk with respect to the device main body. In
A guide portion is provided inside the device body so as to face the front surface of the device body with the detection pin interposed therebetween, and the guide portion has an inclined side facing the free end portion of the detection pin with a gap. Is formed as
When the detection pin receives a pressing force of a predetermined level or more from the disk at the initial position of the lever member and is brought into pressure contact with the inclined side of the guide portion, the width from the center of the disk insertion opening is determined with respect to the detection pin. A disk device characterized in that a component force in a direction of leaving is applied.   2. The conveyance roller according to claim 1, wherein a conveyance roller for conveying the disk into and out of the apparatus main body is disposed inside the disk insertion slot, and a clamping member for clamping the disk between the conveyance roller is provided. And the guide member is integrally formed with the clamping member.